Diego Muilenburg,MD, FACS


Surgical Oncologist, CTCA Phoenix

Diego Muilenburg - Surgical Oncologist

The best part of being a doctor at Cancer Treatment Centers of America® is getting to work with a team of skilled clinicians who collaborate under one roof to determine the best, individualized treatment options for our patients.

CTCA Phoenix
Surgical Oncology
Medical school:
Doctor of Medicine - Georgetown University School of Medicine, Washington, D.C.
General Surgery - University of California-Davis, Sacramento, CA
Research Fellowship - University of California-Davis Cancer Center, Sacramento
Complex General Surgical Oncology - H Lee Moffitt Cancer Center, Tampa, FL
Advanced degrees:  
General Surgery - American Board of Surgery
Complex General Surgical Oncology - American Board of Surgery

As a Surgical Oncologist at Cancer Treatment Centers of America® (CTCA), Phoenix, Dr. Diego Muilenburg knows how important teamwork is to providing personalized patient care. “Here at CTCA®, the top specialists I consult with to complete a patient’s workup and initiate their surgical treatment are located right down the hall,” says Dr. Muilenburg. “The close proximity to a multidisciplinary team, results in timely, thorough treatment plans and more convenient care for our patients.”

Prior to medical school, Dr. Muilenburg spent two years researching biochemical processes of the immune system at the University of California-San Francisco.  He then earned his medical degree from Georgetown University School of Medicine in Washington D.C.  Following medical school, he returned to the West Coast to complete a surgical internship and residency at the University of California-Davis Medical Center in Sacramento, California.  Having committed himself to the study of Surgical Oncology, Dr. Muilenburg spent an additional two years during residency researching the biochemical mechanisms of pancreatic cancer’s resistance to chemotherapy.

After finishing his chief residency in Sacramento, California, Dr. Muilenburg moved across the country again for the final stage of his training at the H. Lee Moffitt Cancer Center in Tampa, Florida, completing a two-year fellowship in complex general surgical oncology, including additional clinical research in the treatment of advanced stage melanoma.

Dr. Muilenburg joined CTCA in February 2017, after working as a private practice surgical oncologist in Portland, Oregon for several years. He is committed to advancing the surgical treatment of cancer, integrating the latest technologies and techniques when possible to help his cancer patients.  He is particularly interested in minimally invasive surgical options, including the use of da Vinci® robotic surgery.

Dr. Muilenburg is certified by the American Board of Surgery in both General Surgery and Complex General Surgical Oncology.  He is a member of the American College of Surgeons as well as the Society of Surgical Oncology.  Throughout his career, Dr. Muilenburg has authored peer-reviewed original research publications and presented his work at multiple surgical and oncology symposia.

Dr. Muilenburg is an experienced sailor, having crossed the Atlantic Ocean several times and raced in numerous regattas.  He also enjoys many outdoor sports and activities with his wife and two children, including mountain biking, hiking, skiing and tennis.

Patient ratings
Star ratings and comments are only available for medical, radiation and gynecologic oncologists. Gynecologic surgical offerings are not included at this time due to a different survey tool required to evaluate these services. CTCA uses a validated Press Ganey® survey, which captures patient experience feedback for the primary oncology services of chemotherapy and radiation therapy at our comprehensive care and research centers. Following industry best practice, star ratings and comments are only published for physicians with a minimum of 30 completed patient surveys.